Skip to main content

Full text of "Kyocera Paper Feeder PF-7 Service Manual"

See other formats


SERVICE MANUAL 

CgKyDCERa 



June 1994 



PF-7 

Option paper 
feeder 



Export edition/revision 1.00 



PF-7 Service manual 
©1994 by Kyocera Corporation, 
2-14-9 Tamagawadai, Setagaya 
Ward, Tokyo 158 Japan 
All rights reserved. 

Revision 1.00 May, 1994 

Notice 

The information in this manual 
is subject to change without no- 
tification. Additional pages may 
be inserted in future editions. 
The user is asked to excuse any 
technical inaccuracies or typo- 
graphical errors in the present 
edition. 

No responsibility is assumed if 
accidents occur while the user 
is following the instructions in 
this manual. No responsibility 
is assumed for defects in the 
printer's firmware. 

The contents of this manual 
are protected by copyright. No 
part of this manual may be re- 
produced or copied by any 
means without the permission 
of the copyright holder. The 
printer's firmware (contents of 
its read-only memory) is simi- 
larly protected by copyright. 

FCC notice 

This equipment has been tested 
and found to comply with the 
limits for a Class B digital de- 
vice, pursuant to Part 15 of the 
FCC Rules. These limits are 
designed to provide reasonable 
protection against harmful in- 
terference in a residential in- 
stallation. This equipment gen- 
erates, uses, and can radiate 
radio frequency energy and, if 
not installed and used in ac- 
cordance with the instructions, 
may cause harmful interference 
to radio communications. How- 
ever, there is no guarantee that 
interference will not occur in a 
particular installation. If this 
equipment does cause harmful 
interference to radio or televi- 
sion reception, which can be de- 
termined by turning the equip- 
ment off and on, the user is en- 



couraged to try to correct the 
interference by one or more of 
the following measures. 

Reorient or relocate the receiv- 
ing antenna. 

Increase the separation between 
the equipment and receiver. 

Connect the equipment into an 
outlet on a circuit different 
from that to which the receiver 
is connected. 

Consult the dealer or an experi- 
enced radio / TV technician for 
help. 

Changes or modifications not 
expressly approved by the 
manufacturer for compliance 
could void the user's authority 
to operate the equipment. 

Important notice to service 
persons 

Before attempting service on 
this product, including disas- 
sembling, re-assembling, trou- 
bleshooting, and adjustment, 
read this manual carefully. 
During performing service, use 
extreme care to avoid possible 
electric shock hazard, burn, 
and human injuries. Make sure 
the product is not provided 
with any safety facilities other 
than those primarily intended 
for enduser safety. 



11 



PREFACE 

Ppreface 

This manual contains information pertaining to service and maintenance of the 
Kyocera product. The information in this manual contains the following chapters: 

Chapter 1: General information 

Chapter 2: Maintenance 

Chapter 3: Paper specifications 

Chapter 4: Parts catalog 

Chapter 5: Hardware notes 

Appendix: Schematic diagrams 

Legend 

Throughout the chapters, Warning denotes the precaution which, if ignored, could 
result in personal injury, and/or irrevocable damage to the printer. Note denotes 
precautions which, if ignored, could result in damage to the printer. 

Radio interference requirement in European countries 

The option paper feeder PF-7 is intended for use with the following printer models 
which are originally type tested and accepted as a Class B computing device in ac- 
cordance with the EN55022 rules. When installed with the option units, the 
printer's category will be changed as follows: 

FS-1550 Class A 
FS-3500 Class A 

The devices in the Class A category may cause interference to radio or television 
reception particularly in a residential installation. 



in 



CONTENTS 



1 



1.1. General, 1—3 ^^ 

1.2. Feeder setup, 1—4 

1.2.1. Packing List, 1—4 

1.2.2. Setup, 1—4 

1.2.3. Operating the Optional Paper Feeder, 1—7 _ ^ 

1.2.4. Selection from the Printer's Control Panel, 1—10 ^Z 

1.3. Precautions concerning service and maintenance, 1—12 m 

1.3.1. Precautions, 1—12 ' ■ ■ 

1.3.2. Replacement parts, 1 — 12 

1.3.3. Notes concerning paper storage, 1 — 13 TQ 

1.4. Specifications, 1—14 ^^ 

1.4.1. Mechanical specifications, 1 — 14 J^ 

1.5. Paper specifications, 1—15 ^— 

1.5.1. General Guidelines, 1 — 15 

1.5.2. Paper Specifications, 1 — 15 

1.5.3. Selecting the Right Paper, 1—15 



O 
3J 



GENERAL INFORMATION 



This page intentionally left blank 



1—2 



GENERAL INFORMATION 



1.1. General 



Chapter 1 provides how to setup the feeder with the printer, the product features, 
and the basic considerations and precautions that should be observed while follow- 
ing the procedures in disassembly and service of the product. Following the precau- 
tions will be very important to ensure safety in servicing. 



1—3 



GENERAL INFORMATION 

1.1. General 



Chapter 1 provides how to setup the feeder with the printer, the product features, 
and the basic considerations and precautions that should be observed while follow- 
ing the procedures in disassembly and service of the product. Following the precau- 
tions will be very important to ensure safety in servicing. 



1—3 



GENERAL INFORMATION 

Choosing a Location 

The feeder will work best if it is installed in a location that is: 

♦ Level and well-supported: Place the base on a sturdy table or desk. 

♦ Not exposed to sunlight or other bright light (not next to an uncur- 
tained window). 

♦ Well ventilated, not too hot or cold, and not too damp or dry: Tem- 
perature should be 10 to 32.5° C, ideally about 20° C (50 to 90° F, 
ideally about 68° F). Humidity should be 20 to 80%, ideally 65%. 

Installing the Base and the Printer 

The printer is mounted on the upper deck of the base. 

1. Place the base onto a firm, sturdy table or desk. 
Note: The table or desk must be larger than the base. 

2. Align the positioning pins on the top of the base with the holes in 
the base of the printer, then slowly and carefully lower the printer 
onto the base. Make sure that the connector on the base fits squarely 
into the corresponding connector in the base of the printer. See Fig- 
ure 1.2. below. 



Figure 1.2. Installing the printer to 

base 




1—5 



GENERAL INFORMATION 

Choosing a Location 

The feeder will work best if it is installed in a location that is: 

♦ Level and well-supported: Place the base on a sturdy table or desk. 

♦ Not exposed to sunlight or other bright light (not next to an uncur- 
tained window). 

♦ Well ventilated, not too hot or cold, and not too damp or dry: Tem- 
perature should be 10 to 32.5° C, ideally about 20° C (50 to 90° F, 
ideally about 68° F). Humidity should be 20 to 80%, ideally 65%. 

Installing the Base and the Printer 

The printer is mounted on the upper deck of the base. 

1. Place the base onto a firm, sturdy table or desk. 
Note: The table or desk must be larger than the base. 

2. Align the positioning pins on the top of the base with the holes in 
the base of the printer, then slowly and carefully lower the printer 
onto the base. Make sure that the connector on the base fits squarely 
into the corresponding connector in the base of the printer. See Fig- 
ure 1.2. below. 



Figure 1.2. Installing the printer to 

base 




1—5 



GENERAL INFORMATION 

4. Slide the rail with the feeder mounted back toward the printer until 
the connector on the front side of the feeder is fully connected to the 
connector on the base, holding the feeder by the both hands. 

Caution: When mounting the feeder to the printer, be careful to aviod pinch- 
ing your fingers between the two. 

Note: Do not use the adjuster knob on the top of the feeder or the feeder 
plastic cover as a handle for sliding the feeder. 



Figure 1.4. Connecting the feeder to 
the printer 




Make sure that the output slot of the feeder is properly aligned with 
the manual feed slot on the front side of the printer. 

This completes setting up the feeder with the printer. Before using 
the feeder, plug the printer to power and load paper in the paper 
feeder (explained in the following pages). 



1.2.3. Operating the Optional Paper Feeder 

This chapter describes how to load paper in the feeder and to select the feeder as 
the paper source. 

Caution: When the tray is rising or descending, please observe the following 
precautions. 



1—7 



GENERAL INFORMATION 



♦ Keep your fingers out of the slot on the inner side of the feeder. 

♦ While the tray is descending, keep your hands out from under the 
tray. 



Do not push down on the tray or pull it upward. 



Loading Paper 



Once the feeder has been installed in accordance with the instructions provided 
previously, you can prepare to load paper. Before loading paper, you must adjust 
the side plates inside the feeder to the actual width of the paper to be loaded. 

Note: The legal-size paper is not usable with the paper feeder. For details 
on paper size, see Paper Specifications later in this manual. 

1. Turn printer power on. The paper feeder is turned on simultane- 
ously. 

2. Gently open the feeder's tray cover. The paper tray will lower. 

3. Make sure that the paper tray is lowerd and stopped. Then, while 
watching the side plates inside the feeder, rotate the paper adjuster 
knob on top of the feeder clockwise. Stop rotating the knob when the 
side plates have been set to their widest settings (outmost positions). 
See figure below. 

4. Place several sheets of the paper you are going to use with the feeder 
on the center of the paper tray. 



Figure 1.5. Adjusting the paper width 




1—8 



Note: 



GENERAL INFORMATION 

Adjust the side plates by rotating the adjuster knob on top of the 
feeder counterclockwise so that the left and right side edges of the 
paper are flush with the left and right side plates. 

Then, rotate the adjuster knob half a turn clockwise. This allows an 
approximately 1 mm gap between each side of the paper stack and 
the side plate, which is needed to ensure the proper paper feeding. 
See figure below. 

Make sure that the paper edges are evenly aligned on the center of 
the tray and the front edge of the stack fully abuts on the feeder's in- 
side panel. 

6. Load up to 2,000 sheets of paper (four standard reams of packages of 
75 g/m or 20 lb. paper) onto the tray. Fan and flex each ream as you 
load it. Load the paper with the side on which printing is done facing 
upward in the feeder. 



Figure 1.6. Adjusting the side plates 




Note: 



Don't put in more paper than the limit indicated on the inside of the 
feeder. See figure below. 

Close the cover. The tray will rise and a sheet will feed partially into 
the printer. The printer indicates Ready and the feeder is ready for 
operation. 



1—9 



GENERAL INFORMATION 



Loading Envelopes and Postcards 

If you are loading postcards 
in the paper feeder, load 
them so that they are fed 
with the top edge first. For 
envelopes, make sure that 
they are fed with the right 
or bottom edge first. 



□ 



i 



Direction 
of paper 
feed 




Postcard 



Envelopes 



Loading Paper in the Printer's Cassette 

To gain access to the printer's paper cassette for loading paper, etc., slide the paper 
feeder fully backward from the printer. If you are using a Legal-size cassette in the 
printer, you will need to remove the paper feeder from the mounting base (rail). 

Selecting Paper Feed from the Optional Paper Feeder 

You can select paper feed from the optional paper feeder using the FEED SELECT key 
on the printer's control panel. You can also select it by including PRESCRIBE's 
CASS command in a file that you send to the printer from the computer. Note that 
the optional paper feeder replaces the printer's manual feed tray. 



1.2.4. Selection from the Printer's Control Panel 

1. First, verify that the printer's message display shows either Ready or 
Add paper. 

2. Next, press the FEED SELECT key to change the source of paper feed. 
The source indication toggles between the following sequences: 

Cassette 
Manual feed 

To select the paper feeder as the paper source, select Manual feed. 



1—10 



GENERAL INFORMATION 

Notes: When printing on special forms such as envelopes, labels, or thick 
paper, use the printer's STACK SELECT key to select paper output to 
the face up tray. 

If paper is not loaded into the feeder, or the feeder is detached from 
the printer (on the rail which, when pulled, detaches the feeder from 
the printer), the printer shows Add paper. Add paper as explained 
on the previous pages. 

3. Make sure that the printer is ready and on-line, then begin printing. 

During printing using the paper feeder, the printer's message display 
momentarily shows Add paper between pages. This is normal. 

Note: When used with the paper feeder, the printer may print in the posi- 
tion which does not fully corresponds to the one the application soft- 
ware requests. 

Selection Using PRESCRIBE's CASS Command 

Feed selection can be done using the CASS command of the PRESCRIBE command 
language. To switch paper feed to the option paper feeder, place the CASS com- 
mand in a file or program as follows. 

!R! CASS 0; EXIT; 

When the printer receives the CASS command, it automatically does a form feed 
operation. Therefore, the CASS command should be sent either at the beginning of 
the file, or at the beginning of an intermediate page. 

The PRESCRIBE FRPO R4 command changes the printer's default (power-on) pa- 
per cassette setting. To change the power-on paper source to the optional paper 
feeder, use the following command sequence. 

!R! FRPO R4, 0; EXIT; 



1—11 



GENERAL INFORMATION 

1.3. Precautions concerning service and maintenance 



Only a qualified technician should perform service on the equipment, who is famil- 
iar with fundamental safety counter-measures as dictated for all electronics techni- 
cians. Observe the following precautions during service and maintenance of the pa- 
per feeder. These are to prevent the possible personal injuries to the technician and 
the damage to the equipment. 



1.3.1. Precautions 

Always observe the following precautions when maintaining or inspecting the pa- 
per feeder. 

♦ When performing any maintenance or inspection procedure, first un- 
plug the power cord. Make sure that the printer power is turned off 
before replacing circuit boards or electrical components in the paper 
feeder. 

♦ To prevent electrostatic discharge damage to electrical circuits, be 
sure to wear an antistatic band when handling the circuit boards. 

♦ Be particularly careful when reconnecting the power after having re- 
paired or replaced a component that has the potential for causing an 
electric shock. 

♦ If the paper feeder is to be transported or stored for a lengthy period 
of time, the unit should be packed in its original packaging. 

♦ If packed in their original packaging, these units can be stacked five 
high for up to six months. They should not be stacked sideways or 
upside down, however. 

♦ Store the paper feeder in a cool, dark, dry area. Avoid storage in 
dusty areas. 

♦ Ship units out on a first in, first out basis. 



1.3.2. Replacement parts 

Be sure to use only Kyocera-recommended supplies and components. Kyocera as- 
sume no liability in the event of damage resulting from the use of unauthorized 
components. 



1—12 



GENERAL INFORMATION 



1.3.3. Notes concerning paper storage 

use of paper with a high moisture content in the paper feeder can adversely affect 
printing quality through the occurrence of paper jams, wrinkling, and other diffi- 
culties. Observe the following paper handling precautions. 

♦ Store paper in a dry place. Do not place paper directly on a damp 
floor. 

♦ Do not stand paper on end for storage. Stack paper horizontally on a 
flat surface. 

♦ After loading paper in the paper cassette, store any leftover paper in 
the original wrapping or a plastic bag. 



1—13 



GENERAL INFORMATION 



1.4. Specifications 



1.4.1. Mechanical specifications 



Mem 



Applicable printers 



Print speed with feed from 
PF-7 



Paper size 



Paper capacity 



Environmental 
requirements 



Noise 



Dimensions 



Weight 



Paper feeder 



Base 



Paper feeder 



Base 



Power supply 



Kyocera FS-1550/A and FS-3500/A 



FS-1550/A: 7.5 pages/minute (in copy mode) 
FS-3500/A: 12.5 pages/minute (in copy mode) 



Width: 76 to 216 mm (3 to 8.5") x Height: 148 to 305 mm (5.8 to 12") 



2,000 sheets maximum, 75 g/m 2 (0. 1mm) 



Temperature: 10 to 32.5° C 

Humidity: 20 to 80% RH 

Ideal conditions are 20° C/65% RH, altitude under 2000 m. 



Max. 54 dB(A) during paper feeding 
Max. 60 dB(A) during moving tray 



352 mm (13.9") H x 345 mm (13.6") W x 376 mm (14.8") D 



PB-1 (for FS-1550/A): 209 (8.2") H x 345 (13.6") W x 641 mm (25.2") 
D 

PB-2 (for FS-3500/A): 169 (6.7") H x 345 (13.6") W x 641 mm (25.2") 
D 



7.5 kg (16.6 lbs.) 



PB-1 (for FS-1550/A): 6 kg (13.2 lbs.) 
PB-2 (for FS-3500/A): 5.8 kg (12.8 lbs.) 



+24V/+5V supplied from printer through mount base 



1—14 



GENERAL INFORMATION 



1.5. Paper specifications 



1.5.1. General Guidelines 

The paper feeder is designed for use with various special types of print media such 
as adhesive-backed label, thick paper, envelopes, and post cards, it may not be 
used to print on paper not satisfying the requirements below. 

Note: The manufacturer assumes no liability for problems that occur when 
paper not satisfying these requirements is used with the paper 
feeder. 

Selection of the right paper is important. The wrong paper can result in jams, mis- 
feeds, curl, poor print quality, and paper waste, and in extreme cases can damage 
the paper feeder and/or the printer. The guidelines given below will increase the 
productivity of your office by ensuring efficient, trouble-free printing and reducing 
wear and tear on the paper feeder and the printer. 



1.5.2. Paper Specifications 



The following table summarizes the basic paper specifications. 



Item 


Specification 


Weight 


60 to 200 g/m 2 (16 to 53 lbs/ream) 


Thickness 


0.086 to 0.29 mm (3.4 to 11.5 mils) 


Squareness of 
corners 


90± 0.2° 


Curl 


Inream flat within 4 mm 


Packaging 


Moisture-proof ream wrapping required 




Moisture 
content 


4 to 6% 


Direction of 
grain 


Long grain 





Pulp content 


80% or more 



1.5.3. Selecting the Right Paper 

Printer printing is a process involving light beam, electrostatic discharge, toner, 
and heat. In addition, as the paper passes through the printer it undergoes consid- 



1—15 



GENERAL INFORMATION 



erable sliding, bending, and twisting motions. A high- quality printing paper 
matching the requirements withstands all these stresses, enabling the paper feeder 
and the printer to turn out clean, crisp printed copy consistently. 

Remember that all paper is not the same. Some of the factors to consider when se- 
lecting paper for use with the paper feeder are as follows: 

Condition of the paper: Avoid using paper that is bent at the edges, curled, dirty, 
torn, or contaminated with lint, clay, or paper shreds. 

Use of paper in these conditions can lead to illegible printing, misfeeding, and pa- 
per jams, and can shorten the life of the paper feeder and the printer. In particu- 
lar, avoid using paper with a surface coating or other surface treatment. The paper 
should have as smooth and even a surface as possible. 

Paper size: The minimum size of paper loadable in the paper feeder is 76 x 148 
mm (3 x 5.8 inches). The maximum size is 216 x 305 mm (8.5 x 12 inches). The pa- 
per feeder can feed paper of any sizes between these sizes (shaded area in the fig- 
ure below), including the standard sizes of A4, B5, A5, letter-size, etc. The legal 
size paper is not usable with the paper feeder. 



Figure 1.7. Paper sizes 



Direction of paper feed 














S3 






»ft 






00 






UD 






— - ■ 






§ 






s 






00 






xp 






r-t 






C 






**** 






a 












Min. 76 mm f3 in.) 





Max. 216 mm (8.5 






o 



1—16 



GENERAL INFORMATION 

Since the printer does not recognize the size of the paper currently loaded in the 
option paper feeder, it assumes that all paper fed from the paper feeder have the 
legal size (8-1/2 by 14 inches). You can use the SPSZ (Set Paper SiZe) command of 
the PRESCRIBE command language to tell the printer the size of the paper or en- 
velope. Refer to the printer's PRESCRIBE II COMMAND REFERENCE manual. 

Smoothness: The paper should have a smooth, uncoated surface. Paper with a 
rough or sandy surface can cause voids in the printed output. Paper that is too 
smooth, however, can cause multiple feeding and fogging problems. (Fogging is a 
gray background effect.) 

Basis weight: Basis weight is the weight of a standard quantity of paper. In the 
traditional system the standard quantity is a ream consisting of 500 sheets meas- 
uring 17 x 22 inches each. In the metric system the standard quantity is 1 square 
meter. 

Paper that is too light or too heavy can cause misfeeding, jams, and premature 
wear of the paper feeder and the printer. Uneven paper weight can cause multiple 
feeds, print defects, poor toner fusing, blurring, and other print quality problems. 
The proper weight is 60 to 200 g/m 2 (16 to 53 lbs/ream). 

Moisture content: Moisture content is defined as the percent ratio of moisture to 
the dry mass of the paper. Moisture can affect the paper's appearance, feedability, 
curl, electrostatic properties, and toner fusing characteristics. 

The moisture content of the paper varies with the relative humidity in the room. 
When the relative humidity is high and the paper absorbs moisture, the paper 
edges expand, becoming wavy in appearance. When the relative humidity is low 
and paper loses moisture, the edges shrink and tighten, and print contrast may 
suffer. 

Wavy or tight edges can cause misfeeding and alignment anomalies. The moisture 
content of the paper should be 4% to 6%. 

To ensure the proper moisture content it is important to store the paper in a con- 
trolled environment. Some tips on moisture control are: 

♦ Store paper in a cool, dry location. 

♦ Keep the paper in its wrapping as long as possible. Rewrap paper 
that is not in use. 

♦ Store paper in its original carton. Place a pallet etc. under the carton 
to separate it from the floor. 

♦ After removing paper from storage, let it stand in the same room as 
the printer for 48 hours before use. 



1—17 



GENERAL INFORMATION 



Avoid leaving paper where it is exposed to heat, sunlight, or damp. 



Paper Storage 



When the paper feeder is not to be used for a long time of period, the paper must 
be removed from the feeder and wrapped in moisture-proof paper for storage. 

Envelopes and Postcards 

When selecting envelopes and postcards, use the guidelines given below. 

Envelopes : An envelope is a more complex objects than a single sheet of paper. For 
this reason, it may not be possible to obtain consistent printing quality over the en- 
tire envelope surface. Use the following guidelines to select the proper envelopes. 

♦ Envelopes should have the basis weight of 70 to lOOg/m 2 (0.16 to 
0.22 lbs/ream) and up to 4 plies of the paper that is used to construct 
the paper including all flaps and overlaps. 

♦ Envelopes should have sharply-creased folds and accurately joined 
corner edges. 

♦ Envelopes should have a smooth, uncoated surface. Envelopes that 
are too smooth, however, can give an adverse effect to the drum and 
fuser units inside the printer. 

♦ Envelopes should have a straight grain orientation. 

♦ Envelopes should have a pulp content of al least 80%, and should 
have a moisture content of 4 to 6%. 

Figure below shows some typical envelope types. 

This is the type of envelope best recom- 
mended for use with the option paper 
feeder. 





Although this type of envelope gener- 
ally feeds normally, they are somewhat 
prone to jamming than above. 



1—18 



GENERAL INFORMATION 



rs 



This type of envelop performs reliably, 
provided that envelopes are loaded so 
that the bottom (sealed end) feeds into 
the printer first. 




Avoid using this type of envelope 
made of double-ply paper. 



Before printing on envelopes of any type, test printing performance. Avoid using 
any of the following kinds of envelopes even if the envelope meets the requirments 
above. 

♦ Envelopes that have exposed adhesive surface, or having a peel-off 
sealing string for adhesive surface. (Peeled-off sealing string inside 
the printer can cause a serious problem.) 

♦ Envelopes with metal fasteners or tie strings. 

♦ Envelopes with transparent windows, holes, perforations, or cutouts. 

♦ Envelopes made using paper, pigment, adhesive, or other material 
that will degenerate or release hazardous gases when subjected to 
the heat that is generated in the printer. 

♦ Envelopes that is bent, dirty, or redundant of paper dust. 
Curly Envelopes 

An envelope tends to curl excessively or become uneven in its thickeness since it is 
constructed by paper which is folded, creased, and seamed in many parts, making 
the stack of envelopes on the feeder tray unlevel. To avoid feeding problems, the 
unlevelness of the stack of envelopes on the paper tray must be less than those 
specified in the following figures. 



1—19 



GENERAL INFORMATION 



Vertical curl must be less than 10 mm. 



Horizontal curl must be less than 5 mm. 




Thickness in bottom or top must be less than 
10 mm. 




Thickness in right or left part must be less 
than 5 mm. 





Reduce the envelopes, if necessary to keep the unlevelness of the stack of envelope 
within the specified limit. 

Post cards 

The paper used in postcards should have a basis weight of 135 to 190 g/m 2 (0.3 to 
0.42 lbs/ream) and uncoated. The paper should also satisfy the same conditions as 
white bond paper, listed on page 16. 

Storage of Envelopes and Postcards 

Store envelopes and postcards, making sure of the following hints. 

♦ Avoid leaving paper where it is exposed to sunlight. 

♦ Store envelopes in a clean, dust-free environment. 

♦ Temperature in the storage area should be maintained in the range 
from 50 to 95° F (10 to 35° C), and relative humidity should be kept 
between 20 and 80 %. 



1—20 



CONTENTS 



2 



2.1. Disassembly procedures, 2—3 __ 

2.1.1. Tools required, 2—3 U 

2.1.2. Removing the paper feeder from the printer, 2 — 4 

2.1.3. Removing the tray door, 2 — 5 ^*^ 

2.1.4. Removing the side covers, 2 — 6 

2.1.5. Removing the paper outlet and top cover, 2 — 7 ^^ 

2.1.6. Removing the mounting rail from the base, 2—8 ^3 



2—1 



PART REMOVAL 
This page left blank intentionally 



2—2 



PART REMOVAL 



2.1. Disassembly procedures 

This section provides procedures for removing parts in the paper feeder. Use the 
reverse manner of removal when replacing (new) parts. 

Before beginning disassembly, be sure to read the notes below. 

Warning: Power Before removing the feeder from the printer, and whenever attempt- 
source: ing service to the paper feeder, be sure to turn off printer power and 
unplug the power cord from the AC power source. 

Note: Screws Do not overtighten screws. Use care not to damage screw holes espe- 
cially for self-tapping screws. 

Caution: Static The paper feeder includes static discharge sensitive parts such as cir- 
discharge: cuit boards. When removing or replacing circuit boards, wear a body 
-grounded wrist strap. 



2.1.1. Tools required 

♦ Magnetized #2 Philips screwdriver 

♦ Small flat-blade screwdriver 

♦ Needle nose pliers 



2—3 



PART REMOVAL 



2.1.2. Removing the paper feeder from the printer 

Warning Before removing the paper feeder, turn printer power off. 

To remove the paper feeder from the printer, slide it away from the printer's front 
panel on the rail. Then slowly and carefully raise the printer from the paper 
feeder. This also disengages the connectors on the feeder and the one in the base of 
the printer. 



Figure 2.1. Removing the feeder from the printer 




2^ 



PART REMOVAL 



2.1.3. Removing the tray door 

Note The feeder door tends to self-open when the feeder is put sideways or 
upside-down for service. Tape the door to the feeder to avoid this 
situation or remove the door in prior to making service following the 
manner described below. 

The feeder door is secured to the feeder by catches at the top and bottom. Remove 
two screws on each catch to remove the door. 



Figure 2.2. Removing the tray door 




2—5 



PART REMOVAL 



2.1.4. Removing the side covers 

Note To gain access to any of the internal parts, the side covers must be 
removed first. 

To remove the side cover, remove two screws at the bottom side of the side cover. 
Remove the other side cover using the same manner. 



Figure 2.3. Removing the side covers r 




2—6 



PART REMOVAL 

2.1.5. Removing the paper outlet and top cover 

To remove the paper outlet or the top cover, follow the procedure below. We recom- 
mend that the paper outlet is also removed when removing the top cover. 

To remove the paper outlet, remove two screws as follows. 

To remove the top cover, remove four screws as follows. 

Note The paper width adjuster knob may not be removed before removing 
the top cover. 



Figure 2.4. Removing the paper 
outlet/top copver 




2—7 



PART REMOVAL 



2.1.6. Removing the mounting rail from the base 

To remove the rail from the base, remove four screws that secure the stopper at 
the inner end. Then pull the rail outward as shown below. 



Figure 2.5. Removing the rail from 
the base 




2—8 



PART REMOVAL 



2.1.6. Removing the mounting rail from the base 

To remove the rail from the base, remove four screws that secure the stopper at 
the inner end. Then pull the rail outward as shown below. 



Figure 2.5. Removing the rail from 
the base 




2—8 



CONTENTS 



3.2.2. Exploded view: PB-2, 3—8 



3 



3.1. Introduction, 3 — 3 

3.1.1. Ordering, 3 — 3 TJ 



3.2. Exploded views, j — <t ^ 

3.2.1. Exploded view: PF-7, 3 4 J^ 



33 

CO 

O 

> 



o 



PARTS CATALOG 

This page left intentionally blank 



3—2 



PARTS CATALOG 

3.1. Introduction 



This chapter shows exploded views of the paper feeder and the mounting base 
These are foUowed by parts lists that list the reference designator for each part 
the associated part number for the item, the quantity, and a description of the ' 
part. 



3.1.1. Ordering 

Parts printed in bold letters in the lists are the recommended parts, stocked and 
may be ordered from the nearest Kyocera Regional Service facilities. 

Note Parts that are printed in normal letters are not field replaceable 
parts. 

Contact the local Kyocera Regional Office for detail on part availability. To order i 
part, please specify: J 

♦ Part description 

♦ Part code 

♦ Quantity required 

♦ Reference number in the exploded view 



3—3 



3.2. Exploded views 



PARTS CATALOG 



3.2.1. Exploded view: PF-7 

d 




3—4 



PARTS CATALOG 



Ref. No. 



Part code 



Description 



Q'ty 



Remarks 



01-001 


5MMX866SL006 


FRAME FEED UP 




01-002 


5MMB884SL004 


FRAME FEED LOW 




01-003 


5MMB663SL004 


BKT PICK 




01-004 


5MMT766SN003 


SHAFT FEED PICK 




01-005 


5MMT766SN001 


SHAFT FEED UP 




01-006 


5MMT766SN002 


SHAFT FEED LOW 




01-007 


5MVG148DN012 


GEARZ36 


2 


01-008 


5MVG028DN002 


GEARZ15-Z19 




01-009 


5MVG069DN001 


GEARZ33-Z51 




01-010 


5MVG133DN002 


GEARZ26 




01-011 


5MMW354LD002 


SPRING FEED 


2 


01-012 


5AAMPF7A"03 


ROLLER ASSY 


3 


01-013 


5MVG337DN002 


PULLEY P20-P21 


2 


01-014 


5MVG318DN001 


PULLEY XL1 4 


6 


01-015 


5MMT866SN015 


SHAFT ELEV 




01-016 


5MVG138DN018 


GEAR WHEEL H30 




01-017 


5MVX665DN001 


GUIDE ELEVATOR R 




01-018 


5MVX665DN002 


GUIDE ELEVATOR L 




01-019 


5MMB882SN001 


TABLE PAPER 




01-020 


5MVG117DN001 


GEAR WORM 




01-021 


5MML654SL002 


BKT DC MOTOR 




01-022 


5MMU654SL001 


BKT WORM 




01-023 


5MVG127DN031 


GEAR MOTOR 




01-024 


5MVL332SB002 


ACTUATER ELEVATOR 




01-025 


5MVB882SW002 


COVER TOP 




01-026 


5MMT866SN017 


SCREW GUIDE 


2 


01-027 


5MVX422DN002 


NUT GUIDE R 


2 


01-028 


5MVX422DN003 


NUT GUIDE L 


2 


01-029 


5MMU864SL001 


GUIDE PAPER 


2 


01-030 


5MVG127DN030 


GEAR H15-R 




01-031 


5MVG134DN001 


GEAR H30-R 




01-032 


5MVN653SW001 


KNOB SIZE 




01-033 


5MMX765SL011 


BKT MOTOR 




01-034 


5MMX885SL001 


FRAME R 




01-035 


5MMX884SL001 


FRAME L 




01-036 


5MMU882SN001 


STAY FRONT 




01-037 


5MMS887SL002 


PLATE BOTTOM 




01-038 


5MVB876SW007 


COVER FEED 




01-039 


5MVB886SW008 


COVER SIDE 




01-040 


5MVB887SS001 


COVER TRAY 




01-041 


5MVX332DN002 


PIVOT TRAY 




01-042 


5MMT866SN016 


SHAFT STAY F 




01-043 


5MVVL865WN01 


LABEL ADJUST 




01-044 


5MVS442KC001 


SHEET GUIDE UP 




01-045 


5MVS442KC002 


SHEET GUIDE LOW 




01-046 


5MVS336RF004 


PAD CASSETTE 




01-047 


5MVVSPF7A"1 


LABEL SERIAL 




01-048 


5MMS336SL008 


PLATE WORM 




01-049 


5MVX190DB001 


BELT MXL60-3.2 




01-050 


5MVX190DB002 


BELT XL250-9.6 




01-051 


5MVX190DB003 


BELT XL230-6.4 




01-052 


5EZNT2400301*01 


MOTOR STEPPING 




01-053 


5AAYPF7A"07 


DC MOTOR ASSY 




01-054 


5AAPRLGC2002AH 


P. W BOARD ASSY 




01-055 


5AACCNNA8GEA 


CONN. CORD ASSY S00839 





3—5 



PARTS CATALOG 



Ref. No. 



Part code 



Description 



Q'ty 



Remarks 



01-056 


5AACCNNA9GEA 


CONN. CORD ASSY S00840 


1 


01-057 


5AACCNNB1GEA 


CONN. CORD ASSY S00842 


1 


01-058 


5AAZPF7A"02 


BEARING FEED 


2 


01-059 


5AAZPF7A"03 


TORQUE UMITTER 


1 


01-060 


5ENXOS573533*01 


PT. SENSOR 


1 


01-061 


5MVX211NN019 


LOCKING CARD SPACER 


3 


01-062 


5MMM176CJ003 


METAL BUSH KD 


3 


01-063 


5ESM010235"*01 


MICRO SWITCH 


3 


01-064 


5MMM121CX001 


BUSH DRUM 


4 


01-065 


5MVM176DN009 


BEARING 


4 


01-066 


5MVM122DB003 


BUSH POM 


6 


01-067 


5MVX532DN001 


BKT SENSOR BOTTLE 


2 


01-068 


5ENXGP1A05HR* 


PHOTO SENSOR 


1 


01-069 


5MVG137DB024 


GEAR CLUTCH Z22 


1 


01-070 


5MVVL431WN13 


PAPER LIMIT LABEL 


2 


01-071 


5MWL111WN02 


LEVER LABEL 


4 


01-072 


5MVS824XF002 


DIS CHARGER FEED 


1 


01-073 


5MVVL665WN01 


LABEL HAND CAUTION 


1 


01-074 


5MMW802LD002 


ACTUATOR TRAY 


1 


01-075 


5MVVL221AC02 


SEAL TRAY 


1 


Screws 








01-B11 
01-B12 
01-B14 
01-B15 
01-B21 


5MBTPB3008TN 
5MBTPB3006TZ 
5MBTPB3006T2 
5MBTPB3008TN 
5MBP2012WPLD 


BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
PARALLEL PIN 


2 
4 
4 
2 
3 


01-B22 


5MBCE5060XSW 


E STOP RING 


1 


01-B23 


5MBCC8080XXP 


C STOP RING 


4 


01-B24 


5MBRP3045QNB 


PAN HEAD RIVET 


1 


01-B25 
01-B26 
01-B27 
01-B29 


5MBTPB3006TZ 
5MBTPB3006TZ 
5MBTPB3006TZ 
5MBP2012WPLD 


BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
PARALLEL PIN 


4 
4 
4 
2 


01-B30 


5MBCC8080XXP 


C STOP RING 


4 


01-B32 
01-B33 
01-B34 
01-B35 
01-B36 
01-B37 
01-B38 
01-B42 


5MBTPB3006TZ 

5MBTPB3006TZ 

5MBSP43006NZ 

5MBTPB3008WN 

5MBTPB3006TZ 

5MBSP43008NZ 

5MBTP43008TZ 

5MBP2012WPLD 


BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
TP SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
TP SCREW (+) 
TP T.T. SCREW (+) 
PARALLEL PIN 


3 
2 
2 
1 
2 
2 
2 
2 


01-B43 


5MBP2012WWLD 


SPRING PIN 


3 


01-B44 


5MBCE5060XSW 


E STOP RING 


3 


01-B45 


5MBCE5060XSW 


E STOP RING 


3 


01-B46 


5MBCE5060XSW 


E STOP RING 


3 


01-B47 


5MBCE5060XSW 


E STOP RING 


1 


01-B50 


5MBWK62955NN 


POLY SLYDER 


1 


01-B51 
01-B52 
01-B53 


5MBTPB3012WZ 
5MBTPB3006TZ 
5MBCE7080XSW 


BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
E STOP RING 


4 
1 
1 


01-B54 
01-B55 


5MBSPP3006NZ 
5MBTPB3006TZ 


PAN HEAD SCREW (+) 
BIND T.T. SCREW (+) 


3 
2 



3—6 



PARTS CATALOG 
Ref. No. Part code Description Q'ty Remarks 



01-B56 5MBCE7080XSW ESTOP RING 1 

01-B57 5MBTPB4012TZ BIND T.T. SCREW (+) 1 



3—7 



PARTS CATALOG 



3.2.2. Explodedview: PB-2 







p 




f~\ 




o 




01 


s-\ 


o 




o 






1 

o 




o 

1 


<\l 


r^A 


y 


p) 


IX 






3— $ 



PARTS CATALOG 



Ref. No. 



Part code 



Description 



Q'ty 



Remarks 



01-002 


5AAMPF7B"01 


BASE ASSY B 


1 


01-003 


5MMP153LD001 


STOPPER PF 


1 


01-004 


5MMX432LD001 


SPRING SHAFT FD 


1 


01-005 


5AAZPF7A"01 


ROLLER DL 


4 


01-006 


5MVS778RB002 


FOOT PR 


6 


01-007 


5MBWK65D0ASZ 


FLAT SWASHER 


8 


01-008 


5MVS224XF001 


DIS CHARGER PB 


1 


01-010 


5AACCNNB2GEA 


CONN. CORD ASSY 


1 


01-011 


5MML322LD001 


PLATE EMC 


1 


01-012 


5MMU852SL016 


STAY MAIN 


1 


02-B01 
02-B02 
02-B03 
02-B04 
02-B05 


5MBTPB3008TN 
5MBTPB3008TN 
5MBTPB3008TN 
5MBTPB3008TN 
5MBTPB3006TZ 


BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW (+) 
BIND T.T. SCREW 


1 
1 
2 
4 
6 


02-B13 


5MBTPB3008TN 


BIND T.T. SCREW (+) 


1 


03-001 


5MMU832SL002 


RAIL 


2 


03-002 


5MMU833SL001 


STAY RAIL 


2 


03-003 


5MMS657SL012 


GUIDE PF F 


2 


03-004 


5MMS657SL013 


GUIDE PF R 


2 


03-005 


5MVVL111WN02 


LAVER LABEL 


2 


03-006 


5MVQ843RB001 


PAD RAIL 


1 


03-009 


5MMX321SM001 


CORD KEEP 


1 



3—9 



CONTENTS 



4 



4.1. Introduction, 4 — 3 



4.2. Overall block, 4—4 

4.2.1. Overview of feeder operation, 4 — 5 ^^ 

4.2.2. Electrical parts, 4—7 ^^ 

4.2.3. IC details and pin assignments, 4 — 11 

J3 
O 



> 
2J 



m 
c/> 



4—1 



HARDWARE NOTES 



This page intentionally left blank 



4—2 



HARDWARE NOTES 

4.1. Introduction 

This chapter describes an operational overview of the paper feeder. It ensures cor- 
rect understanding of the behavior of both the mechanical and electrical mecha- 
nism of the paper feeder to assist servicing. 

The following basic functions of the paper feeder are discussed in the following 
pages. 

♦ Overall functionality of the feeder 

♦ Signal definitions 

♦ Tray driving motor driver 

♦ Paper feeding motor driver 



4—3 



HARDWARE NOTES 



4.2. Overall block 



Figure 4.1. is a functional block diagram of the paper feeder. Also see schematic 
diagram in Appendix A of this manual. 



Figure 4.1. Block diagram 



Paper feed 
sensor 



Paper feed motor 



*^ 




Door status 
switch 



Tray top 
sensor 



Power supply 
from printer 




|oooooo] 

6 5 4 3 2 1 




| o o o o~o"| 

5 4 3 2 1 



Feeder main board 
KP-369 



Tray elavation 
motor 



Tray bottom 
switch 



-M •. 



Figure 4.2. Main board 
functions 




Dw-currwit hadbick 



4—4 



HARDWARE NOTES 



4.2.1 . Overview of feeder operation 

The PF-7 paper feeder feeds paper into the printer manual feed slot. The paper 
feeder has no connection with the printer's engine system as to synchronization 
with the printer paper feed. The feeder automatically places the paper at the 
printer's manual feed roller by activating the paper feed motor each time the suc- 
ceeding sheet is pulled into the printer. Absence of paper at the feeder outlet is de- 
tected by the feed sensor which subsequently requests the feeder electronics to feed 
a sheet from the tray. 



Figure 4.3. Feeder paper feeding 



Printer's manual feed roller 



Feed rollers (FRR system: See below.) 




First (top) sheet of 
the paper stack 



Friction-returded roller (FRR) system 

The paper feeder utilizes the friction-returded rollers to ensure a reliable paper 
feeding free of multiple feeding problem. This system is comprised of the paper 
teed roller, reverse roller, and the torque limiter as shown in figure below 



4—5 



HARDWARE NOTES 



Figure 4.4. FRR system 



Feed roller 



Reverse roller 




Torque limiter 



In this system, both the pa- 
per feed and reverse rollers 
are driven clockwise at the 
shaft. The reverse roller, 
however, has the torque 
limiter (one-way clutch) at 
one end which in normal pa- 
per feeding effectively frees 
the reverse roller from the 
shaft to turn in counter- 
clockwise direction by means 
of the friction given by the 
paper feed roller through the 
paper. 



Feed roller 



Q Direction at 
■haft 




^\ Direction at 
fe^S abaft 



Reverse roller 



Assuming more than one 
sheet of paper are acciden- 
tally fed and pinched be- 
tween these rollers, there no 
longer is friction between 
the rollers as the friction is 
subtle among the sheets of 
paper. The reverse roller can 
then rotate following the 
shaft rotation defeating the 
torque limiter. The feed 
roller continues feeding the 
top sheet towards the 
printer; the reverse roller 
feeds the second sheet back- 
ward, thus avoiding misfeed- 
ing problem. 



Feed roller 



O Direction at 
shaft 




Second 
paper 



S~\ Direction at 
~J shaft 



Reverse roller 



4—6 



HARDWARE NOTES 



4.2.2. Electrical parts 

The feeder's internal electronics, including the one-chip microprocessor uPD782 13 1 
as CPU, serves mainly for activating and deactivating the motors to elevate the 
tray and feed paper (towards the printer manual feed rollers) in cooperation with 
the sensors. 

The function of each major component of the feeder is as follows. (All these compo- 
nents are connected to the main circuit board KP-369.) 

Figure 4.5. Electrical parts 




Paper feed sensor (O) 

This sensor monitors the presence of paper at the feeder output slot. It reuqests 
the feeder CPU to forward or stop paper feed into the feeder output slot. 



1 Also used with some Kyocera printer models. 



4—7 



HARDWARE NOTES 

If paper is not found at the sensor, the sensor requests the CPU to drive the paper 
feed motor; as the paper feed motor drives the top sheet of the stack forward and 
the leading edge of the paper hits and passes the sensor and the leading edge of 
the paper reaches the printer's registration rollers, the sensor then requests the 
CPU to stop revolving the motor. 

Paper feed motor (@) 

This is a stepping motor which is activated when requested by the paper feed sen- 
sor to feed paper toward the feeder output slot. Feed motor driver U4, SLA7024M, 
is a constant-current chopper type driver IC which includes power MOSFETs for ' 
simplified driver configuration of the stepping motor. See section 4.4. for details on 
this IC. The driver output current for the motor is adjusted and limited by compo- 
nents R7, R8, R12, and C5 which determine the output current, Io , in the follow- 
ing formula: 



Io 



R8 



R7+R8 R12 



The chopping frequency, represnted by the pe- 
riod of time during the absence of current flow, 
Toff, for the stepping motor is determined as 
follows: 



Toff- 0.51J25-C2 = 0.51 JJ6-C3 

Feeder door status sensor (© ) 

This sensor reports feeder CPU as to whether 
the feeder door is closed or open. If the door is 
open, the sensor sends COVOP signal by which 
the CPU begins activating the tray elecation 
motor so that the paper tray descends until the 
tray bottom sensor is energized or the door is 
closed again. 

Tray top position sensor (©) 

This sensor, when the top of the paper stack in 
the paper tray has reached the top most posi- 
tion, ready for feeding paper through the feeder 
output slot, sends feeder CPU the TRYUP sig- 
nal to stop the tray elevation motor. 



vcc 

I 



R5 5 R6: 



R9;: 



C4 



+24V 
-O- 



R11 



C2^: C34: 



VI 



U4 
SLA7024M 



OUT/A 

TdA 

REFA 

GA 

IN/A 

IN/A 

VSA 

OUT/A 

RSA 



OUT/B 

IN8 

IN/B 

6B 

REFB 

TdB 

VSB 

OUT/B 

RSB 



12 



RIO 



+24 V 
-P- 



C5± 



°'t 



Figure 4.6. Feed motor driver (U4) 



4—8 



HARDWARE NOTES 



Tray bottom position sensor (©) 

This sensor, when stepped on by the paper tray as the paper tray descends, sends 
feeder CPU the TRYLW signal to stop the tray elevation motor. 

Tray elevation motor (©) 

This is a DC-servo motor to raise or descends the paper tray. It revolves in either 
forward or reverse direction in the control of motor driver U5, TA8428K, a full 
-bridge type DC motor driver, in accordance with the feeder door status sensor 
(switch). The logic for motor revolution is tabled as follows. 





Input 


Output 


IN1 


IN2 


OUT A 


OUT A 


Raise 


L 


H 


L 


H 


Descend 


H 


L 


H 


L 


Still 


L 


L 


High imped. 



U1 



CPU 



1 U5 5 

2 DRIVER IC s 



out! 



H level is approximately 5V for inputs and 20— 22V for outputs. 
Power supply connector (©) 

A 10-pin connector is used to connect the feeder to the printer power supply. The 
connector supplies +5V and +24V DC power only: No signal connection is made be- 
tween feeder CPU and the printer engine system. The connector is the same type 
one as used for some Kyocera printer models and option equipment. 

Figure 4.7. Power supply connection 



PF-7 



YC6 

■t-SV 
2|GN0 
3 U-24V 
4Jgnd 



BASE 



4—9 



HARDWARE NOTES 

Feeder main board (©) 

All electrical component are mounted on board KP-369. The feeder CPU jx PD78213C 
is responsible for most functions of the paper feeder electronics. It entertains sen- 
sor output signals such as from tray elevation top/bottom sensors, paper feeding 
sensor, door status sensor; and delivers motor driving outputs for paper feeding 
and tray elevation motors. Figure below shows the inputs/outputs for the CPU. 



4—10 



HARDWARE NOTES 



4.2.3. IC details and pin assignments 

This section describes information on the major ICs used with the paper feeder. 
Figure below shows ICs used with the paper feeder (KP-369 board). 

Figure 4.8. ICs on board 



"YCT 



c=3 in 



3'" 1 



SLA7024M 



31 

V 



9S3A393 . £ 



»□ 






£ 



& 



c 

B 



ramar 



•S 



Main controller, nPD78213GC (U1) 

The 78213 is a one-chip microprocessor, including ROMs and RAMs for controlling 
paper feeding using motors. This IC looks like the figure below and has the follow- 
ing pin assignment. 



Figure 4.9. 78213 



64 = 




For pin assignment, see next page. 



4—11 



D78213 pin assignment 



HARDWARE NOTES 



Pin# 


Port# 


Signal 


Function 


Input/ 
Output 


1 


P64 


RD 


Read timing for option units, L: Active 


Output 


2-5 


P63-60 


— 


Unused 


— 


6 


— 


RESET 


Reset 




7 


— 


X2 


— 


8 


— 


XI 


— 


9 


— 


Vss 


— 


10-17 


P57-50 


A15-8 


Address bus, H: active 


Output 


18 


P47 


AD7 


Address/data bus A7/D7, H: active 


Both 


19 


P46 


AD6 


Address/data bus A6/D6, H: active 


20 


P45 


AD5 


Address/data bus A5/D5, H: active 


21 


P44 


AD4 


Address/data bus A4/D4, H: active 


22 


P43 


AD3 


Address/data bus A3/D3, H: active 


23 


P42 


AD2 


Address/data bus A2/D2, H: active 


24 


— 


Vss 


— 


— 


25 


P41 


AD1 


Address/data bus Al/Dl, H: active 


Both 


26 


P40 


ADO 


Address/data bus AO/DO, H: active 


27 


— 


ASTB 


— 


— 


28-31 


P20-23 


— 


Reserved 


Input 


32-39 


P24-33 


— 


Unused 


— 


40 


— 


— 


— 


— 


41 


— 


VDD 


— 


— 


42 


— 


AVss 


— 


— 


43 


— 


AVref 


— 


— 


44 


P75 


COVOP 


Door status, H: open 


Input 


45 


P74 


— 


Unused, connected to ground 


Input 


46 


P73 


TRYUP 


Tray elevate signal, H: elevate 


Input 


47 


P72 


TRYLW 


Tray lowering signal, H: lower 


Input 


48 


P71 


FEED 


Paper feed signal, H: Feed paper 


Input 


49 


ANO 


ISENS 


Tray elevate motor encoding sensor 


Input 


50-53 


P34-36 


— 


Unused 


— 


54 


POO 


OUT1 


Tray elevat. motor drive signal 1 


Output 


55 


P01 


OUT2 


Tray elevat. motor drive signal 1 


Output 


56,57 


P02, 03 


— 


Unused 


— 


58 


P04 


OUTA 


Feed motor drive signal, phase A 


Output 



4—12 



HARDWARE NOTES 



Pin# 


Port# 


Signal 


Function 


Input/ 
Output 


59 


P05 


OUTB 


Feed motor drive signal, phase B 


Output 


60 


P06 


OUTC 


Feed motor drive signal, phase A 


Output 


61 


P07 


OUTD 


Feed motor drive signal, phase B 


Output 


62-64 


P67-65 


— 


Unused 


— 



4—13 



HARDWARE NOTES 



Feed motor driver, SLA7024M (U4) 

The SLA7024M, U4, is a constant 
-current chopper type driver IC which 
includes power MOSFETs for simpli- 
fied driver configuration of the step- 
ping motor. The PWM-type chopper 
circuitry has a good high-frequency 
response and advanced driver effi- 
ciency. Figure below shows a simpli- 
fied internal circuitry of this IC. 

Figure 4.11. SLA7024M 
internal circuit 



Figure 4.10. SLA7024M 
appearance 





so |6 |6 6S 6,8 6s 



Tray motor driver, TA8428K (U5) 

The TA8428K, U5, is a full-bridge driver IC 
for controlling the tray elevation motor. This 
IC provides four modes of motor operation, 
forward-rotating, reverse-rotating, brake, and 
stop. The door status switch, when open, re- 
quests U5 to rotate the tray elevation motor 
in forward direction so that the paper tray de- 
scends; while it drivers the motor in reverse 
direction when the door status switch is 
closed. The driver stops the motor either 
when the tray has reached the top or bottom 
most position, pressing the appropriate sen- 
sor. 



Figure 4.12. TA8428K 
appearance 




O 



FTi 



4—14 



CONTENTS 



5 



5.1. Clearing paper misfeeding, 5 — 3 

5.1.1. Removing jammed paper, 5 — 3 

5.1.2. Other paper handling problems, 5 — 4 ^^ 

J3 

5.2. Working with electrical problems, 5—5 

5.2.1. The paper feeder does not feed paper, 5 — 6 ^^ 

5.2.2. The paper tray does not ascend, 5 — 7 ^^ 

5.2.3. The paper tray does not descend, 5 — 8 



CO 



CO 

X 

o 

O 



O 



TROUBLESHOOTING 



This page intentionally left blank 



5—2 



TROUBLESHOOTING 



5.1. Clearing paper misfeeding 



5.1.1. Removing jammed paper 

If the printer's message display shows Paper jam or Add paper (even though 
the feeder has paper loaded inside), detach the paper feeder from the printer by 
sliding with the rail away from the printer, holding the paper feeder by both hands 
as shown below. 

If paper is partially fed out from the feeder's output slot, pull the paper out by 
hand as shown. 

Notes When paper is protruding from the feeder's output slot, always re- 
move it by pulling the paper in its normal direction of travel. Never 
pull paper backwards. 

Figure 5.1. Removing jammed paper 




If paper is not stuck at the feeder's output slot, open the feeder cover and pull the 
paper in the feeder. 

If no paper is found jammed inside the paper feeder, slide the paper feeder away 
from the printer, and check if paper is jammed inside the printer. 

After connecting the feeder back to the printer, open the printer's upper unit once, 
then close it again and wait for the message display to show Ready. 



5—3 



TROUBLESHOOTING 



5.1.2. Other paper handling problems 

If paper handling problems are frequently experienced, check for the conditions in- 
dicated in the table below. 



Symptom 


Suggested Cause 


Remedy 


Paper will not 
feed properly into 
printer. 


Too much paper in feeder. 


Open cover. Remove any quantity in excess of 
the marked limit. 


Paper too slick or stack together 
tightly. 


Fan and flex paper to separate sheets. Check 
that paper isn't too shiny or slick causing 
rollers to slip. Replace with plain paper to 
check feeder operation. Refer to Paper 
Specifications section later in this manual for 
proper paper. Clean rollers of feeder with lint 
-free cloth. 


Paper is damaged. 


Check paper stack for bent corners, edges, 
etc., and replace paper. 


Side plates inside the feeder are 
improperly set. 


Set the side plates so that a 1-mm gap is left 
between each side of the paper stack and the 
side plate. 


Feeder does not 
raise/lower paper 
tray. 


Feeder cover not closed/opened. 


Open/close feeder cover. 


Printer not powered on. 


Plug printer power cord. 


Feeder not properly mounted on 
the base (rail). 


Mount feeder aligning the arrow marks on the 
feeder with the arrow marks on the rail. 


Feeder's connector not properly 
connected to the printer's 
connector. 


Press the feeder toward the printer firmly to 
ensure good contact of both connectors. 



5—4 



TROUBLESHOOTING 

5.2. Working with electrical problems 

The following symptoms of feeder operation imply the electrical problems . 

♦ The paper feeder does not feed paper. 

♦ The paper tray does not ascend nor descend. 

Use the following flow charts to locate the cause for each problem. 



5—5 



TROUBLESHOOTING 



5.2.1. The paper feeder does not feed paper 

When the paper feeder does not feed paper, it is most likely that the paper feed 
motor is defective. 



Paper feed motor won't rotate. 

Remove all paper in the feeder. Remove paper which may be protruding from the feeder's outlet, if 



any 



Tray elevation motor YC6 connected properly? 

rotates? No ^ No- 

Yesl 

YC1 connected properly? No-> Connect YCl properly. 

Yes-l 

Is resistance between the Replace paper feed motor. 

following terminals approx. 

25Q? 

Pins 1 and 2 No-> 

Pins 1 and 3 

Pins 4 and 5 

Pins 4 and 6 

Yes-l 

YC3 connected properly? No-> Connect YC3 properly. 

Yesi 

Is the level at pin 1 of YC3 M Replace paper feed sensor, 
low? N0_> 

Yesi 

Replace the board. 



5—6 



TROUBLESHOOTING 



5.2.2. The paper tray does not ascend 





Paper tray won't ascend 




Paper feed motor 
rotates? 


M YC6 connected 
m ~* properly? 

Yesi- 


No-> 


Connect YC6 
properly. 






+5V at pin 1 of 
YC6? 


No-> 


All wires of YC6 
conduct? 


.. Replace YC6 wires. 




Yesi 




Yesi 




Yesi 


Paper tray ascends 
if power is turned 
off then on? 

Yesi 

Check paper stack 
is put fully inside 
the feeder. 




Harness inside the 
base (PB1/2) 
coducts (wired 
properly)? 

Yesi 

Check fuse Fl on 
printer's engine 
board. 


No-> 


Paper tray 
descends? 


M YC2 connected 
N0 ~> properly? 

Yesi 


No^ 


Connect YC2 
properly. 

Yesi 




Yesi 


+21 to +23V at pin 
2ofYC2whenthe 
tray moves? 

Yesi 

Replace the tray 
elevation motor 
and the harness 
altogether. 




Replace board. 




Is the level at pin 
3 of YC4 low? 


Is the level at pin 
3 (orange-col.) of 
tray top sensor 
low? 

Yesi 


No-* 


+5V at pin 1 
(brown-col.) and OV 
at pin 2 (red-col.) 
of tray top sensor? 

Yesi 


Replace harness. 
No-> 


Yesi 


Replace harness. 




Replace tray top 
sensor. 




Is the level at pin 
4ofYC41ow? 


Tray ascends when 
shortcircuiting door 
sensor? 

Yesi 


No-> 


Harness for door 

sensor 

disconnected? 

Yesi 




Yesi 


Replace door 
switch. 




Replace harness. 




Replace board. 











5—7 



TROUBLESHOOTING 



5.2.3. The paper tray does not descend 



Paper tray won't descend 



Paper feed motor 
rotates? 



No- 



Yesi 



Paper tray 
ascends? 



No- 



Yesi 



Is the level at pin 
1 of YC5 low? 



No-> 



Yesi 



Does tray descend 
when YC4 is 
disconnected? 

Yesi 

Replace door 
sensor. 



YC6 connected 
properly? 

Yesi 

+5V at pin 1 of 
YC6? 

Yesi 

Paper tray 
descends if power 
is turned off then 
on? 

Yesi 

Check/remove 
obstacle that may 
be preventing the 
motor revolution. 

YC2 connected 
properly? 

Yesi 

+21 to +23V at pin 
lofYC2whenYC4 
is removed from 
board? 

Yesi 

Replace the tray 
elevation motor 
and the harness 
altogether. 

Does tray descend 
when YC4 is 
removed from 
board and tray 
bottom sensor is 
shortcircuited? 

Yesi 

Replace tray 
bottom sensor. 



No-> 



No-> 



Connect YC6 
properly. 



N Replace YC6 wires. 

Yesi 

Harness inside the 
base (PB1/2) 
coducts (wired 
properly)? 

Yesi 

Check fuse Fl on 
printer's engine 
board. 



No-> 



Replace the 
harness. 



No- 



No- 



No^ 



Connect YC2 
properly. 



Replace board. 



Harness to tray 
bottom sensor 
disconnected? 



Yesi 

Replace harness. 



5—8